To be included, the subject must have committed a sexual offense and must present a diagnosis of paraphilia with an indication of treatment with androgen antagonists. Paraphilia is defined by the Diagnostic and Statistical Manual as a sexual behavior disorder characterized by "sexually arousing fantasies, needs or recurrent and intense sexual behaviors generally involving (1) of non-human objects, (2) the suffering or humiliation of oneself or partner, (3) children or other persons without their consent, occurring during a period of at least six months "(Criterion A). This disorder is responsible for sexual behavior which is "clinically significant disturbances in social, occupational or other important areas of functioning" (Criterion B).